From 34b0686be1c0d9082696681f3bdf44f802ed139a Mon Sep 17 00:00:00 2001
From: johnbillion <johnbillion@602fd350-edb4-49c9-b593-d223f7449a82>
Date: Wed, 23 Apr 2014 22:04:03 +0000
Subject: [PATCH] Avoid an expensive attachment counting query on the post
 editing screen. See #27985, for trunk.

git-svn-id: https://develop.svn.wordpress.org/trunk@28191 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-includes/media.php | 14 ++------------
 src/wp-includes/post.php  | 17 +++++++++++++++++
 2 files changed, 19 insertions(+), 12 deletions(-)

diff --git a/src/wp-includes/media.php b/src/wp-includes/media.php
index fe5b63b8ff..b65529e2e3 100644
--- a/src/wp-includes/media.php
+++ b/src/wp-includes/media.php
@@ -2695,16 +2695,6 @@ function wp_enqueue_media( $args = array() ) {
 		}
 	}
 
-	$audio = $video = 0;
-	$counts = (array) wp_count_attachments();
-	foreach ( $counts as $mime => $total ) {
-		if ( 0 === strpos( $mime, 'audio/' ) ) {
-			$audio += (int) $total;
-		} elseif ( 0 === strpos( $mime, 'video/' ) ) {
-			$video += (int) $total;
-		}
-	}
-
 	$settings = array(
 		'tabs'      => $tabs,
 		'tabUrl'    => add_query_arg( array( 'chromeless' => true ), admin_url('media-upload.php') ),
@@ -2719,8 +2709,8 @@ function wp_enqueue_media( $args = array() ) {
 		),
 		'defaultProps' => $props,
 		'attachmentCounts' => array(
-			'audio' => $audio,
-			'video' => $video
+			'audio' => wp_has_mime_type_attachments( 'audio' ) ? 1 : 0,
+			'video' => wp_has_mime_type_attachments( 'video' ) ? 1 : 0
 		),
 		'embedExts'    => $exts,
 		'embedMimes'   => $ext_mimes,
diff --git a/src/wp-includes/post.php b/src/wp-includes/post.php
index d537148d29..8da9437251 100644
--- a/src/wp-includes/post.php
+++ b/src/wp-includes/post.php
@@ -2291,6 +2291,23 @@ function wp_count_attachments( $mime_type = '' ) {
 	return apply_filters( 'wp_count_attachments', (object) $counts, $mime_type );
 }
 
+/**
+ * Determine if at least one attachment of a particular mime-type has been uploaded
+ *
+ * @global wpdb $wpdb
+ *
+ * @since 3.9.1
+ *
+ * @param string $mime_type The mime-type string to check.
+ *
+ * @return int|null If exist, the post ID of the first found attachment.
+ */
+function wp_has_mime_type_attachments( $mime_type ) {
+	global $wpdb;
+	$sql = sprintf( "SELECT ID FROM $wpdb->posts WHERE post_type = 'attachment' AND post_mime_type LIKE '%s%%' LIMIT 1", like_escape( $mime_type ) );
+	return $wpdb->get_var( $sql );
+}
+
 /**
  * Get default post mime types
  *